Turkey's foreign minister encouraged dialogue to resolve the standoff over Teheran's disputed nuclear program after meeting with US National Security Adviser Stephen Hadley on Thursday. Hadley's visit to Turkey came two days before talks in Geneva in which a senior US diplomat will for the first time join colleagues from other world powers at a meeting with Iran's chief nuclear negotiator. William Burns, the No. 3 US diplomat, will attend talks with Iranian envoy Saeed Jalili in Switzerland on Saturday aimed at persuading Iran to halt activities that could lead to the development of atomic weapons. Turkey believes Iran has the right to develop a peaceful nuclear energy program, but calls on Teheran to be transparent.